Fixes error of loading assets

[Grabli66]

It fixes error of loading assets in examples.

[stephengold]

Please explain how moving the file.exists() into simpleInitApp() fixes an error. What error? Under what circumstances does the error manifest?

[Grabli66]

Static method main does not calling from the launcher. And that is why "useHttp" is always false. Because of that assets can't be loaded from the internet. And i am getting error that "wildhouse.zip" or "quake3level.zip" not found.

[MeFisto94]

See for example the TestMultipleFilters.
I got the report on Discord and asked them to do the PR here.

Debugging showed that the Test Chooser does not call the main method, but just instantiates the Test as Application and starts that. I mean it's obvious, it cannot guess for any potential main methods etc.

The only thing we discussed was that we might want a redesign for those tests to use test-data and/or to have some caching for HTTPable resources. Also when google shuts down it's google code archive, we'd potentially loose those assets. But that's the topic of a future PR/Issue, this fixes the test because main() is not called from the TestChooser. We might want to double check every Test for that.

[stephengold]

Included in the v3.3 branch at 21cbdb5